Heat exchanger apparatus



Jan. 27, 1942. R. M. JOYCE HEAT EXCHANGER APPARATUS 2 Sheets-Sheet Filed March 6, 1940 In venior A iiorney Jan. 27, 1942. R. M. JOYCE 2,271,484

' HEAT EXGHANGER APPARATUS Filed March 6, 1940 2 Sheets-Sheet Inventor fiaerf'flej iygg M A iiorney Patented Jan. 27, 1942 2,271,484 HEAT EXCHANGER APPARATUS Robert M. Joyce, Greenville, Miss.

Application March 6, 1940, Serial No. 322,602

1 Claim.

My invention relates to improvements in heat exchangers, and particularly to an arrangement of this character for heating air by passing the air to be heated through tubes to which are applied the products of combustion of an oil or the like burner, and/or the products of combustion or exhaust of a Diesel engine or the like, and an important object of my invention is to provide a simple and eflicient arrangement of this character.

Another important object of my invention is to provide an arrangement of the character in dicated which is especially adapted to economically provide hot air for use in cotton drying apparatus, the said arrangement being of a muffle type refractory material furnace capable of withstanding high temperatures, and providing the following specific advantages:

(1) A higher degree of efilciency at a lower operating cost.

(2) Low static pressure due to the unrestricted flow of air therethrough, thereby reducing the power requirements on the fan.

(3) Heats a larger volume of air traveling at a higher velocity than present related devices.

(4) In utilizing the heat provided by the hot water from an internal combustion engine, the cost of heat source is substantially reduced.

(5) Positive prevention of mixing and contact of the air to be heated with the products of combustion of the burner, thereby eliminating any possibility of sparks getting into the cotton when the device is used for supplying hot air to a cotton drying apparatus, thereby eliminating all fire hazard from this source.

(6) The elimination of water'for heating or other purposes, thereby preventing corrosion and other deterioration of the parts due to this agency.

(7) The elimination of any moving parts sub- ;iect'to wear, and

Other important objects and advantages of my invention will be apparent from a reading of the following description taken in connection with the drawings, wherein for purposes of illustration I have shown preferred embodiments of my invention. v

In the drawings:

Figure 1 is a general side elevational view of oil burner and internal combustion engine cooldrawings.

ing system radiator, as heat sources.

Figure 2 is an enlarged VerticaLlong'itudinaX sectional view taken through Figure 1.

Figure 3 is a transverse vertical sectional view taken through Figure 2 approximately centrally.

Figure 4 is a view similar to Figure 1 of a modifled form of the invention in which the internal combustion engine cooling system radiator is absent.

Figure 5 is a fragmentary perspective view showing the arrangement of the bricks.

Referring in detail to the drawings, and particularly to Figure 2, the numeral 5 generally designates a concrete slab supported upon a surface 6. From the concrete slab 5 rise the two laterally spaced opposite walls I and 8 of the exchanger which are substantially parallel and have the lower ends thereof connected by a bottom plate 5 and the end edges tnereoi' connected by end plates l0 and ii, the walls 1 and 8 extending to an elevation above the end walls It] and ll as is evident from Figures 2 and 3 of the The ends of the casing comprised by the side walls I and 8 are tapered as indicated by the numerals l2a and I3a in the embodiment shown in Figure i, but only at the end l2 in the embodiment shown in Figure 2, with a cellular hot water radiator l4 across the tapered portion l3a in the embodiment of Figure 2. The radiator has upper and lower pipes l5 and 06 leading tnererrom Ior connection to the cooling system or a Diesel engine or other internal combustion englne which while in operation W111 supplyhot water to the radiator. The end I! of the casing has a nange I] connected with a nange It! on a tapering conduit l9, while the corresponding portion or the opposite end or the casing has a tapering conduit zu which has a nange 2| connected to the radiator structure. ADOVe the level 01' the radiator the casing has laterally inwardly inmining walls u and n which extend Irom the upper enus OI Dne walls I 81110. H, and also longtdulnaiiy inwardly inc in ng walls as and an wulcll run .[L'Ulll tile upper ends 01 the 'POIblOlLS I and lo, tile Walls I and l and Z6 and mi converging to merge into the 1180K "a wmcn has a nange no to which is connected the nange 2| on the stack zu. v

Plate-like extensions 29 and 30 rising above the upper ends or the end walls In and II and situated in the portions l2 and I3 are perlorated in vertical and longitudinal rows as indicated in an embodiment of the invention employing both Figure 3 of the drawings to receive me ends or air conveying and heating tubes 3| which open through the plates 29 and 30, respectively, so as to pass the air entering the conduit 20 through the casing and to the air outlet conduit IS without any contact with the products of combustion rising around the tubes 3| from the furnace section of the device which is positioned below.

the tubes 3|.

The furnace section of the device is composed of the firebrick lining 32 which lines the bottom 9, the end walls I and H and the lower portions of the side walls 1 and 8 to a point just below the lowermost of the tubes 3|. Resting on the bottom 9, or rather on the lining thereon, is the assembly composed of the vertically staggered bricks 33 which form perforate side and end walls, in a rectangular shape, and act as supports for the refractory tile top 34 which protects the lower tubes 3| from direct contact 01 the ilame coming through the burner opening 35 which is formed in the end wall II, and through which an oil burner or the like is to be projected. The plate 34 is perforated at suitable intervals as indicated by the numeral 36.

In the above described embodiment of the invention the oil burner or the like may be operated simultaneously as a heat source with the radiator 30 into which the hot water from the cooling system of the Diesel engine or other internal combustion engine enters by the pipe I and leaves by the pipe l6, so that two sources of heat are applied to heating of the air entering the conduit 20 in passing through the radiator l4 and through the tubes 3|, to reach the conduit l9. Midway between the ends of the tubes 3| is a heat dividing wall 31 which acts not only as an additional support for the tubes 3|, but acts as a baiiie to prevent concentration of the heat at any point in the casing, while providing for an even distribution of the heat rising through the casing with respect to the stack 23 which contains a thermostatically controlled damper 28', to provide automatic control of the burner which heats the burner section.

Referring now to the embodiment of the invention shown in Figure 4, this is similar in all respects to the embodiment above described except that the tapering casing end portion |3a is present and the water radiator I4 is absent. Otherwise the structure and arrangement or the two embodiments is similar.

This application is a continuation in part of my copending application Serial No. 262,524, filed March 17, 1939, for Heat exchanger.

Although I. have shown and described herein preferred embodiments of my invention, it is to be definitely understood that I do not desire to limit the application of the invention to the precise structural and functional details disclosed, except as may be required by the scope of the subjoined claim.

Having described the invention, what is claimed as new is:

Heating apparatus comprising a casing, cool air inlet and heated air outlet conduits connected to opposite ends of the upper part of said casing, respective headers supported across the mouths of said conduits, said headers being formed with matching multiplicities of holes with horizontal air heating tubes arranged with their opposite ends inserted in aligned ones of the holes, each of said tubes tnereby providing communication between the inlet conduit and the outlet conduit, a vertical partition provided with holes passing all of said tubes, said partition being located substantially midway between said headers, a pervious wall structure forming a combustion compartment in said casing below said tubes and said partition, a burner opening at one end of said compartment below the tubes whereby heating gases may enter said compartment from one end and take a generally horizontal path across said compartment before rising around said tubes, said casing having its top sloping upwardly and inwardly from its edges to the center, a stack connected with the said central portion of the top, with the vertical partition extending across the casing below the central portion of the stack, said stack and said vertical partition acting to segregate portions of the heating gases along the tubes on opposite sides of the partition whereby air passing through said tubes from said inlet conduit to said outlet conduit is uniformly heated.

ROBERT M. JOYCE. 

